so many deference....only recommended and actually procedure is flash firmware if any update is big ...simply mobile data or little fluctuating wifi never recommended or process which can produce software holes and glitches only...thatswhy Samsung introduced smart switch that people can get highest performance of device but peoples do same mistake repeatedly and facing problems...and if you don't know the procedure then just go to Samsung service center they will flash it..it's absolutely free of cost within warrenty period of device otherwise they will charge 236 rs.....If you already updated it and your device is working fine already then it's ok but actually firmware flash is better over data
